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Why Not Teflon!

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Posted by Rick Crockett on September 16, 2000 18:05:36 UTC

Hi Tom:

Nylon should only be used with petroleum jelly (Vaseline). The powders will imbed into the nylon and eventually start binding rather than lubricating. Telflon in size to make bushings is very expensive and is an unsafe material (especially if heated vapor is released in the machining process). Teflon can not be machined well by conventional techniques and makes a very poor bushing. Teflon is a liquid and will mush out when used as a bushing, especially under loads from relatively small shafts. Delrin is better to machine than nylon(I machine both). There are plastic bushings that incorporate teflon particles in a Delrin type of base, a sort of a plastic substitute for Oilite. While more resistant to dirt and abrasion they are not as dimensionally stable or accurate. There are other plastics I have machined and cast but Oilite will be better for this application than any of them . It will most likely cost less too. Still permanently lubricated and sealed bearings are the way to go if possible.

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